Hello,
I hope I'm writing in the right place here
I've built a greenhouse made of steel, and the underside of it is flat iron with holes in it, and I plan to run screws through to fasten it to my wall, which is made of lecablock.
So my question is what type of screws and plugs should I use to ensure it stays secure and I don't accidentally crack the lecablock? I probably need the right length screw to reach into the core and will need to pre-drill.
What is usually recommended?
Thanks for the help!
I hope I'm writing in the right place here
I've built a greenhouse made of steel, and the underside of it is flat iron with holes in it, and I plan to run screws through to fasten it to my wall, which is made of lecablock.
So my question is what type of screws and plugs should I use to ensure it stays secure and I don't accidentally crack the lecablock? I probably need the right length screw to reach into the core and will need to pre-drill.
What is usually recommended?
Thanks for the help!
Lightweight concrete screw without pre-drilling usually works well in leca but you must avoid the edges (regardless of method). Low RPM on the screwdriver and as soon as it holds, you have to ease off the throttle; half a turn too far and there's a risk the screw will come loose completely.
It's absolutely enough! There are lecaskruv in different dimensions so you can choose a coarse dimension if you're worried. It's very common for house sills to be attached with lecaskruv if the edge beam is of leca, so there shouldn't be any problems with a greenhouse.M Meizter said:Oh, is that enough? Feels "weak"
Sorry for the late reply.
Such screws are anything but weak; rather, they are quite sturdy and hold well if you buy the right length. Normally, the entire threaded part of the screw must go into the blocks.
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From personal experience, a 6mm wood screw holds well in LECA, but you have to be careful; once it starts spinning, it will keep spinning. Additionally, it can vary between different block manufacturers. Therefore, an 8mm lightweight concrete screw of suitable length can hold a looooooooooot. But they do NOT tolerate being screwed in under tensile load, meaning what you are attaching must sit relatively flush against it already. It doesn't hurt to pre-drill a larger hole in what is to be attached to reduce the risk.
I am going to attach a pair of steel square tubes to lecablock with plaster on it. It would probably work with lightweight concrete screws, maybe pre-drill a small hole. However, I am somewhat tempted by a thread that can be fastened with a nut and washer, so I'm wondering if one can use concrete anchors in leca, or will it definitely crack then?
No, it won't work. It will not hold at all and will just be pulled out. An anchor adhesive and threaded rod are better.I irrbloss said:
